I think the (semi) hidden subtext of both of the applications is the sending of naked pictures or "sexting". I read through the reviews of Snapchat in the app store and it's pretty clear. That may clarify the desire for knowing when a screen cap has been grabbed.
This is also useful for the generalized digital-restrictions-management problem, such as sending someone confidential documents and making sure they don't copy it and send it elsewhere. (Well, insofar as anything is actually useful for DRM, but you can do a reasonably good job on a non-jailbroken platform with iOS's security properties.)
Comments
I think the (semi) hidden subtext of both of the applications is the sending of naked pictures or "sexting". I read through the reviews of Snapchat in the app store and it's pretty clear. That may clarify the desire for knowing when a screen cap has been grabbed.
This is also useful for the generalized digital-restrictions-management problem, such as sending someone confidential documents and making sure they don't copy it and send it elsewhere. (Well, insofar as anything is actually useful for DRM, but you can do a reasonably good job on a non-jailbroken platform with iOS's security properties.)
I don't believe anybody is under the impression that Snapchat is for anything other than sexting.